Spearfishing Spool Holder

A 3d model to mount a fly spool to your speargun, I used the following aluminum/stainless steel fly wheel for $22
There are 3 versions, one is for a jbl speargun or other round barrel speargun with m5 bolts that are threaded into the barrel. Another is for a wooden square speargun, and another is also for a wooden speargun however its directly attached to the flywheel with 2 m3x10mm bolts. The third model is only compatible with the flywheel linked below. It might be with compatible with others